20310220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{607}}^1$

素因数の和:862

約数の個数: 48

約数和(自身を含む): 49029120

約数和(自身を除く): 28718900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 239, 478, 607, 956, 1195, 1214, 1673, 2390, 2428, 3035, 3346, 4249, 4780, 6070, 6692, 8365, 8498, 12140, 16730, 16996, 21245, 33460, 42490, 84980, 145073, 290146, 580292, 725365, 1015511, 1450730, 2031022, 2901460, 4062044, 5077555, 10155110, 20310220]

約数ペア:

[(1, 20310220), (2, 10155110), (4, 5077555), (5, 4062044), (7, 2901460), (10, 2031022), (14, 1450730), (20, 1015511), (28, 725365), (35, 580292), (70, 290146), (140, 145073), (239, 84980), (478, 42490), (607, 33460), (956, 21245), (1195, 16996), (1214, 16730), (1673, 12140), (2390, 8498), (2428, 8365), (3035, 6692), (3346, 6070), (4249, 4780)]